AR6201 - RT6201 - RCU6201 - AR6203
DV 14307.03 Issue 1 7/2013 Page 3-3
When pressing and holding down a key for at least 2 seconds, the 620X detects
a “long press”. Otherwise a “short press” is assumed.
If any action by the user is invalid the whole display is inverted for a
short time. For example when pressing a key and the operation is not allowed
at that time.
3.2.2 Symbols Shown on the Display
Symbol Function
IC Intercom operation active (triggered by VOX or external IC
key).
Intercom operation via VOX is disabled.
TX The transceiver is in transmit operation
SQL The squelch function is active. Weak signals will be
suppressed.
SCAN Transceiver operates in scan mode.
STO The transceiver performs a storage operation.
LOW BATT
128.225 Inverted figures or letters on display ready to edit
3.3 Start-Up
CAUTION: Do not switch ON the 620X VHF transceiver or RCU6201 during engine
start or shutdown
Note: Excessive pulses on the DC bus of the aircraft may cause damage on
electrical circuits of any installed instrument.
a. Turn “ON” the VHF transceiver by turning the volume knob clockwise.
b. During PBIT the display indicates the message ”WAIT”, the software version
of “Control Head” (CH) and the software version of “Chassis Module” (CM)
are indicated.
c. If the PBIT has detected error(s), the display indicates ”FAILURE” (for
details see chapter 3.14).
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